A&D EJ-200 Manual, Explained: Setup, Counting, Density Kit and Calibration

This EJ-200 manual guide covers setup, counting, the density kit and calibration for the A&D EJ-200 (210 g x 0.01 g), on sale for $199.00 (regular $455.00), in stock.

The A&D EJ-200 is a 210 g x 0.01 g portable precision balance from A&D’s Newton EJ series, with a 110 mm round pan, a backlit display and AC or battery power. One A&D manual covers ten EJ balances, from the 120 g EJ-120 to the 6,100 g EJ-6100, and mixes notes for 0.01 g and 0.1 g models. This guide keeps only what applies to the EJ-200, including the density kit made for the 0.01 g models and the breeze break. For the 0.1 g models see our EJ-6100 manual guide. MNM Scales is an authorized A&D Weighing dealer.

EJ-200 manual specifications

Item	EJ-200
Capacity x readability	210 g x 0.01 g
Repeatability (standard deviation)	0.01 g
Linearity	±0.01 g
Sensitivity drift	±20 ppm per °C (10 to 30 °C)
Calibration weight (factory setting)	200 g (not included); the value can be changed
Counting	Samples of 5, 10, 25, 50 or 100 pieces; up to 21,000 pieces; minimum unit weight 0.01 g
Percent mode	Minimum reference weight 1 g; displays to 0.1 percent
Other units (capacity x readability)	oz 7.408 x 0.001 · lb 0.4630 x 0.0001 · ozt 6.752 x 0.001 · ct 1,050.00 x 0.05 · dwt 135.03 x 0.01 · grain 3,240.8 x 0.2 · momme 56.000 x 0.005
Display	7-segment LCD with backlight, 16 mm characters, updates 10 times per second
Power	AC adapter, or 4 AA batteries (not included) for about 70 hours with the backlight off
Operating range	-10 to 40 °C (14 to 104 °F), below 85 percent RH, non-condensing
Pan	110 mm round pan

Setting up the EJ-200

1. Unpack: the box holds the main unit, the weighing pan and the instruction manual.
2. Fit the pan on the main unit.
3. Choose the spot: a firm bench away from dust, drafts, vibration, large temperature swings, condensation, magnetic fields, direct sun, heaters and air conditioners. At 0.01 g, a draft from a vent shows up on the display.
4. Level it: turn the leveling feet until the bubble in the spirit level sits in the center of the circle.
5. Power it: plug the AC adapter into the jack on the back, or fit 4 AA (LR6) batteries in the battery box, watching the polarity. Replace all four when lb0 shows. A spare TB-662 AC adapter is sold separately.
6. Warm it up: A&D asks for the power to be on for at least half an hour before use.
7. Calibrate when you first set it up and every time you move it (see below).

At power-on the EJ-200 shows all its indicators, then zero with the ZERO indicator once the reading is steady. To have it turn itself off after about 5 minutes at zero, set poff 1 in the function table. The back has a security slot for a standard security cable.

The keys and the CAL switch

Key	In weighing	In settings
ON:OFF	Turns the balance on or off	Cancels and turns the balance off
RE-ZERO	Zero and tare in one key: zeroes small drift, subtracts a container as tare	Changes the blinking digit or the parameter
UNITS	Steps through the stored units, pcs, percent and SG	Cancels and moves on, or returns to weighing
SAMPLE	In pcs or percent, enters sample or reference storing; hold it to open the function table (func)	Selects the class, item or digit
PRINT	Sends the reading to a printer or PC; hold it to start or end a GLP title block	Stores the setting (Enter)
CAL switch (under the cover on the bottom)	Hold until Cal shows to calibrate; keep holding to CC for a calibration test	–

Units: store only the ones you use

The EJ-200 can show grams, ounces, pounds, troy ounces, carats, momme, pennyweight, grains, newtons, density (specific gravity), pieces and percent. Which ones appear was set at the factory; you choose from those.

1. Hold SAMPLE until func appears, then press SAMPLE until Unit appears and press PRINT.
2. Press SAMPLE to show each unit, and RE-ZERO to select it (the STABLE indicator marks a selected unit).
3. Press PRINT to store the set, then UNITS to go back to weighing. The first unit you selected becomes the one shown at power-on.

For grain, carat and troy-ounce math, our grain to gram converter does the conversions.

Counting, percent and the comparator

Counting (pcs)

1. Press UNITS until pcs shows, then press SAMPLE.
2. Press SAMPLE again to pick 5, 10, 25, 50 or 100 samples.
3. Tare a container with RE-ZERO, put the chosen number of pieces on the pan and press PRINT to store the unit weight.
4. Add the parts to count. With ACAI on, adding three or more pieces makes the ACAI indicator blink while the balance refines the unit weight; leave the pan alone until it stops.

If the pieces are too light, the balance asks for a bigger sample (25 -, 50 -, 100 -) or shows lo. With the factory Umin 0 setting the EJ-200 accepts pieces down to 0.01 g, which suits small parts such as screws, washers and electronic components. Our counting scale buying guide covers larger counting jobs.

Percent

Press UNITS until the percent unit shows, press SAMPLE, then RE-ZERO, place the reference (at least 1 g) and press PRINT. Each sample then reads as a percentage of that reference, to 0.1 percent.

Comparator: HI, OK and LO

The comparator checks every reading against an upper and lower limit and shows HI, OK or LO. Hold SAMPLE to func, press PRINT, step with SAMPLE to Cp and choose a condition with RE-ZERO:

• Cp 0 off · Cp 1 all data · Cp 2 all stable data
• Cp 3 plus data above +4 divisions · Cp 4 stable plus data above +4 divisions
• Cp 5 data above +4 or below -4 divisions · Cp 6 stable data above +4 or below -4 divisions

Press PRINT to store it, then enter the limits at Cp Hi and Cp lo (SAMPLE moves the digit, RE-ZERO changes it, PRINT stores). The limits are shared by grams, pieces and percent.

Density with the EJ-13 kit

The EJ-13 density determination kit (not included) is made for the 0.01 g EJ models, including the EJ-200. It weighs a solid sample in air and then in water, and the balance shows its density (specific gravity) to two decimal places.

1. Remove the weighing pan and the fixing frame. Set the beaker stand on the balance and attach the pan stand to the pan support.
2. Place a beaker of water on the beaker stand and the sample pan on top of the pan stand.
3. Press UNITS until SG shows. HI blinks while the balance weighs in air; press RE-ZERO if it does not read zero.
4. Place the sample on the upper pan, wait for STABLE and press SAMPLE to store the weight in air.
5. LO blinks. Move the sample to the lower pan in the water, about 10 mm below the surface, wait for STABLE and press SAMPLE. The density appears.
6. Press SAMPLE to measure another sample, or UNITS to leave density mode.

The balance works out density as weight in air divided by (weight in air minus weight in water), times the density of the water. The factory setting uses water at 25 °C (0.99704 g/cm³). Set function ldin 0 to enter the water temperature (hold UNITS in SG mode), or ldin 1 to enter a liquid density directly (factory 1.0000 g/cm³). In A&D’s example, 20.00 g in air and 17.51 g in water reads 8.01.

EJ-11 breeze break and carrying case

A&D notes the EJ-11 breeze break (not included) is mainly used on the 0.01 g models like the EJ-200, and all EJ balances can use it. Remove the fixing frame, fit the breeze break frame in its place and attach the breeze break. It keeps air movement from unsettling the last digit on an open bench. The EJ-12 carrying case (not included) is for carrying the balance by hand; A&D notes that dropping it, even in the case, can damage it.

Function table settings

Hold SAMPLE until func shows, press PRINT, then SAMPLE moves to the next item, RE-ZERO changes the value and PRINT stores the class. UNITS returns to weighing. Factory settings are marked with an asterisk.

Item	Settings	What it does
poff Auto power-off	0* off · 1 on	Turns off after about 5 minutes at zero
Cond Response	0 fast to 4 slow (2*)	Higher is steadier on a busy bench
st-b Stability band	0 = 0.5d · 1* = 1d · 2 = 2d	When the STABLE indicator lights
trc Zero tracking	0 off · 1* on	Holds zero against slow drift
pnt Decimal point	0* point · 1 comma	Separator on display and output
Cp Comparator	0* to 6	See the comparator section
prt Data output mode	0 stream · 1* PRINT key · 2 auto-print A · 3 auto-print B · 4 command only	When data goes out the interface
pUse Output pause	0* none · 1 = 1.6 s	Spacing for continuous output
info GLP output	0* none · 1 AD-8121 printer · 2 general (PC)	Adds calibration and test reports
bps Baud rate	0 = 2400* · 1 = 4800 · 2 = 9600 · 3 = 1200	Must match the printer or PC
btpr Data bits and parity	0* 7 bits even · 1 7 bits odd · 2 8 bits none	Must match the printer or PC
aCai ACAI	0 off · 1* on	Refines the unit weight while counting
Umin Minimum unit weight	0* = 1d · 1 = 1/10 d · 2 = sample total of 5d or more	Smallest piece the counter accepts
smpl First sample number	0* 10 · 1 = 25 · 2 = 50 · 3 = 100 · 4 = 5	Starting sample size in pcs mode
ltUp Backlight	0 off · 1 to 4 off after 5, 10, 30* or 60 s · 5 stays on	Battery life versus visibility
ldin Liquid density input (SG mode)	0* water temperature · 1 liquid density	How the density kit gets the liquid density

EJ-200 calibration

The EJ-200 calibrates with an external weight. Its stored calibration value is 200 g, and you can change it if you calibrate with a different weight. Use a weight of the right class for a 0.01 g balance (see calibration weight classes and calibration weights); the weight is not included.

1. Warm the balance up for at least half an hour with nothing on the pan.
2. Press and hold the CAL switch under the cover on the bottom until Cal appears, then release. The display shows Cal 0.
3. To change the weight value, press SAMPLE, set the digits (SAMPLE moves, RE-ZERO changes) and press PRINT.
4. With Cal 0 showing and the pan empty, press PRINT to weigh zero. Do not touch the pan.
5. When the weight value shows, place that weight on the pan and press PRINT.
6. end appears. Remove the weight and press UNITS or the CAL switch to return to weighing. With GLP output on, glp shows while the calibration report prints.

If you move the balance and have no weight on hand, A&D’s gravity acceleration correction (RE-ZERO at Cal 0) sets the local gravity value from the map at the back of the manual. A calibration with a weight on site makes it unnecessary.

To check accuracy without changing the calibration, hold the CAL switch past Cal until CC shows, weigh zero, then the target weight. With info 1 or info 2 set, the balance outputs a calibration test report.

Cal e means the weight was too heavy for the stored value and -Cal e too light; check the pan and the weight value. If the reading drifts after calibration, see scale will not zero or keeps drifting.

EJ-02 USB and EJ-03 RS-232C interfaces

The EJ-200 has one option slot on the back, so it takes either the USB or the RS-232C interface at a time. Turn the balance off, open the slot cover, plug the interface into the connector inside and secure it with its screws.

• EJ-02 USB (not included): sends the weight value one way into Excel, Word or Notepad on a PC with no driver. It sends data only.
• EJ-03 RS-232C (not included; the EJ-03C comes with a cable): connects a printer or PC through a straight 9-pin D-Sub cable. The balance is DCE: pin 2 transmit, pin 3 receive, pin 5 ground, 6 DSR, 7 RTS, 8 CTS.

Over RS-232C the balance answers three commands: Q sends the current reading, Z zeroes or tares, and U changes the unit. Data lines start with ST (stable), QT (stable count), US (unstable) or OL (over range), followed by the value and unit, and end in CR LF. Set prt, bps and btpr to match the other end. For cabling and software, see how to connect a scale to a computer.

For GLP records, set an ID number under id in the function table; the calibration and test reports then carry the maker, model, serial number and ID.

EJ-200 error codes

Display	Meaning	What to do
eeeeee	Overload	Remove the load; it is above 210 g
--e	Range over notice: strong upward force on the sensor	Check for anything caught around the pan; if it stays, the sensor may need service
lo	Sample too light for a unit weight or percent reference	Use more pieces or a heavier reference
Cal e / -Cal e	Calibration weight too heavy / too light	Check the pan and the calibration value
lb0 / Hb0	Batteries exhausted / battery voltage too high	Fit four new batteries or use the adapter
Hb1 / lb1	Adapter voltage too high / too low	Check that the adapter is the correct type
error1	Reading will not settle	Stop vibration and drafts, then press UNITS

If an error will not clear, our repair bench can help; codes for other brands are in our scale error codes guide.

Where the EJ-200 fits

The EJ-200 is built for general weighing, small-parts counting, kitting, density checks, classrooms, labs and hobby work. For buying or selling by weight, see our legal for trade jewelry scale guide for the Class II options.

Texas note: TDA does not require an NTEP certificate for every device, but the scale must meet NIST Handbook 44 and suit its use; some scales do need one, so we recommend NTEP models and can check yours. See TDA’s scales used in trade guidance (PDF) and our TDA scale certification guide, or call us or TDA to confirm your use.

Care and storage

Clean with a lint-free cloth dampened with warm water and mild detergent; no organic solvents. Ship it in the original packing. EJ balances can be stacked for storage, up to four high. Remove the batteries if it will sit unused for a long time.

Calibration, repair and rentals from MNM Scales

• Calibrated before it ships: the 210 g EJ-200 is in our small scale and balance tier: in-house calibration with a certificate is $95 and NIST calibration with a NIST-traceable certificate is $395. See balance calibration in Houston, all tiers on the scale calibration service page, and NIST vs in-house certificates.
• Mail-in calibration: pack the balance in its original packing, as A&D recommends, and ship it to our shop with the mail-in calibration service.
• Cypress pickup by appointment: drop off or pick up at our Cypress, TX shop (21249 FM 529 Rd, Cypress, TX 77433).
• On-site service: on-site calibration is $295 plus $2 per mile, round trip, once per visit, plus the calibration fee for each scale. Our TDA-registered technicians calibrate balances at labs, schools and shops across the Houston area.
• Repair: load cell, adapter, interface and keypad problems go to our scale repair bench.
• Rentals: we rent all types of scales; ask about a scale rental while yours is in for service.

Frequently asked questions

Where can I find the A&D EJ-200 manual?

A&D publishes the EJ series instruction manual (1WMPD4001917D) on its Newton EJ series page. One manual covers the EJ-120 through the EJ-6100, including the EJ-200.

How do I calibrate the A&D EJ-200?

Warm it up for half an hour, hold the CAL switch under the bottom cover until Cal shows, press PRINT to weigh zero with the pan empty, place the 200 g weight (or the value you set) and press PRINT. When end shows, remove the weight.

What calibration weight does the EJ-200 use?

The factory value is 200 g. You can change the stored value from the Cal 0 screen with the SAMPLE key. The weight is not included.

Where is the CAL switch on the EJ-200?

Under a cover on the bottom of the balance. Hold it to start calibration (Cal) or keep holding for a calibration test (CC).

Can the EJ-200 measure density?

Yes, with the EJ-13 density determination kit (not included), made for the 0.01 g EJ models. Select SG with the UNITS key, weigh the sample in air, then in water, and the balance shows its density to two decimal places.

Can the EJ-200 connect to a computer?

Yes, with one interface in its option slot: the EJ-02 USB sends readings straight into Excel or Notepad, and the EJ-03 RS-232C connects a printer or PC and accepts the Q, Z and U commands. Interfaces are not included.

How long do the batteries last in the EJ-200?

About 70 hours on 4 AA alkaline batteries with the backlight off. Batteries are not included; the balance also runs on its AC adapter.

What is the smallest part the EJ-200 can count?

With the factory Umin 0 setting it accepts a unit weight down to 0.01 g, using samples of 5, 10, 25, 50 or 100 pieces, and counts up to 21,000 pieces.