M235-0-0-25-0 Simpson, M235-0-0-25-0 Datasheet - Page 2

• Manufacturer Part Number: M235-0-0-25-0
• Description: Current Meter
• Manufacturer: Simpson
• Type: Ammeterr

Specifications of M235-0-0-25-0

• No. Of Digits / Alpha: 3-1/2
• Meter Function: DC Ammeter
• Meter Range: 0A To 2A
• Digit Height: 12.7mm
• Power Consumption: 4VA
• Operating Temperature Range: 0°C To +55°C
• Sample Rate: 3 SPS
• Meter Signal Input: Current
• Accuracy: ±0.25% %
• Bezel: 0.95 in. x 2.84 in.
• Brand/series: M235 Series
• Common Mode Rejection Ratio: 90 dB (Min.) @ 60 Hz
• Connection Type: Screw
• Current, Rating: 2 A
• Cut Out, Panel: 0.88×2.68 "
• Depth: 2.36 in.
• Dimensions: 2.84"W×0.95"H×2.52"D
• Display Digit Height: 0.5 "
• Display Resolution: 1 mA
• Display Type: LCD
• Function: Ammeter
• Humidity: 0 to 85% (Non Condensing) (Relative) @ 40 °C
• Indicator Type: 3-1⁄2 Digit
• Material, Casing: Thermoplastic
• Meter Type: Digital
• Number Of Digits: 3-1/2
• Primary Type: Electronic
• Range, Measurement: 2 A
• Standards: UL Listed
• Temperature, Operating: 0 to 55 °C
• Voltage Drop: 200 mV
• Voltage, Supply: 85 to 250 VAC
• Equipment Type: DC Current Meter
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

DISPLAY
Type: 7-segment LCD
Height: 0.5” (12.7mm)
Decimal point: 3 -position programmable
Overrange indication: Most significant digit = “1”
Backlighting: Optional negative image, red back-
lighting
Polarity: Auto with “-” indication, “+” implied
POWER REQUIREMENTS
AC Volt: 85-250VAC @40-440Hz
DC Volt: 9-32VDC
Power Consumption:
85-250VAC: 2.5VA min/4VA max
9-32VDC: 1.5VA min/3VA max
Rated Circuit to Ground Voltage: 750VRMS
Decimal Point:
Display Hold:
Input Signal:
Input Power:
Using a screwdriver or thumbnail,
spread tab on each side of case to
unlock top half. Lift rear top half and
slide away from front of meter.
OF METER
Wiring Display
Display Scaling
Specifications
FRONT
To select a decimal point, connect the appropriate DP pin (DP1, DP2, or DP3) to the DP COMMON (HOLD). Unused DP inputs
may remain unconnected (open).
Connect HOLD to DP COMMON (HOLD). If this feature is not required, the DP COMMON (HOLD) pin may remain unconnected
(open).
Connect the IN HI and IN LO to the signal to be monitored.
Connect power to the L1 and L2 terminals. For AC powered units, L1 and L2 are not polarized.
For 9-32 DC powered units, L1 must be positive with respect to L2.
These instruments are designed for maximum safety to the operator when mounted in a panel according to instruc-
LOCKING
TOP HALF
OF CASE
TAB
(Input Signal) IN HI
(Input Signal) IN LO
tions. They are not to be used unmounted or for exploratory measurements in unknown circuits.
Mini-Max indicators have limited range coarse
and fine adjustments for display scaling. There
are no optional connections required for these
to function. The “coarse” calibration R12 will
allow a limited range of scaling values. The
meter can be scaled down to 1/2 the value of
the input or scaled up to 2 times the value of
the input or a maximum reading of 1.999,
which ever is lower. Example: a 2 AMP input
has a maximum reading of 1.999 counts, so
you cant double the 2 AMPs, but you can
make 1 AMP read 1.999. The “fine” calibration
R9 allows for an approximate range of 1% of
the “coarse” calibration. Apply full scale input
to the meter. Adjust R12 to be within 1% of the
desired scaled value, then use R9 to obtain the
final desired result.
HOLD
ACCURACY @ 25°C
±(0.1% of reading + 1 count)
2A: ±(0.25% of reading + 1 count)
5A: ±(0.50% of reading + 1 count)
ENVIRONMENTAL
Operating Temperature: 0 to 55°C
Storage Temperature: -10 to 60°C
Relative Humidity: 0 to 85% non condensing
@ 40°C
Temperature Coefficient:
(
Warmup time: Less than 20 minutes
NOISE REJECTION
NMRR: 60dB, 50/60Hz
CMRR: (w/1K
ANALOG TO DIGITAL CONVERSION
Technique: Integrating
Rate: 3 samples/second-typical
DP3
DP2
DP1
0.02% of input
unbalanced @ 60Hz): 90dB min
0.2 digits)/ C
L1 (POS) (Power)
L2 (NEG) (Power)
EX (NEG)
EX (POS)
DP COMMON
(HOLD)
N N o o t t e e : : Any physical damage to the meter during
calibration will void the warranty
MECHANICAL
Bezel: 0.95” x 2.84”
Depth: 2.36”(60mm)
Panel cutout: 0.88” x 2.68”
Weight: 3.5oz (99.2g)
Case Material:
94-0,UL rated glass-filled thermoplastic
INPUTS: DC Current
200mA
Range
200µA
20mA
2mA
2A
5A
(24mm x 72mm)
Resolution
100nA
100µA
10mA
10µA
1mA
1µA
(22.2mm x 68mm)
Voltage
200mV
200mV
200mV
200mV
200mV
50mV
Drop
Max Input
(unfused)
100mA
400mA
10mA
40mA
3A
6A