M245-0-0-13-0 Simpson, M245-0-0-13-0 Datasheet - Page 2
M245-0-0-13-0
Manufacturer Part Number
M245-0-0-13-0
Description
Digital Panel Meters DCV 20mV 4.5
Manufacturer
Simpson
Type
DC Voltmeterr
Specifications of M245-0-0-13-0
Equipment Type
DC Voltmeter
Input
20 V
Display Type
7 - Segment LCD
Accuracy
±0.04% %
Common Mode Rejection Ratio
90 dB (Min.) with 1 Kiloohms Unbalanced @ 60 Hz
Connection Type
Screw
Cut Out, Panel
0.88×2.68 "
Digit Height
0.5
Dimensions
2.84"L×2.36"D×0.95"H
Display Digit Height
0.5 "
Display Range
Limited
Display Resolution
1 mV
Function
Voltage
Input Impedance
10 Megohms
Material, Casing
Thermoplastic
Meter Type
Digital
Number Of Digits
3-1/2
Power Consumption
2.5⁄4.5 VA (Max.)
Primary Type
Electronic
Range, Measurement
20 VDC
Standards
UL Listed
Temperature, Operating
0 to +55 °C
Voltage, Input
750 V (Max.)
Voltage, Supply
85 to 250 VAC
Weight
3.5 Oz.
No. Of Digits / Alpha
4-1/2
Meter Function
DC Voltmeter
Meter Range
0V To 20V
Operating Temperature Range
0°C To +55°C
Rohs Compliant
No
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
DISPLAY
Type: 7-segment LCD
Height: 0.5” (12.7mm)
Decimal point: 4-position programmable
Overrange indication: Most significant digit = “1”
Backlighting: Optional negative image, red LED
backlighting
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:
Reading Hold:
Input Signal:
Supply 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
Specifications
Display Scaling
Wiring Display
FRONT
To select a decimal point, connect the appropriate DP pin (DP1, DP2, DP3, or DP4) to 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). Hold is optional on this model, and when so equipped, replaces DP4. This feature is available from our modification
centers.
Connect the IN HI and IN LO to the signal to be monitored.
Connect the power to the L1 and L2 terminals. For AC powered units, L1 and L2 are not polarized.
For 9-32VDC 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 instructions. They
LOCKING
TOP HALF
OF CASE
TAB
(Input Signal) IN HI
(Input Signal) IN LO
are not to be used unmounted or for exploratory measurements in unknown circuits.
DP4/
Mini-Max indicators have limited range
coarse and fine adjustments for display
scaling. There are no optional connections
required for these to function.
“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,
but not scaled up. Maximum scaling is
maximum input or a maximum reading of
1.9999, which ever is lower. The “fine” cal-
ibration 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
±(0.04% of input ± 1 count)
ENVIRONMENTAL
Operating Temperature: 0 to 55°C
Storage Temperature: -10 to 60°C
Relative Humidity: 0 to 85% non condensing
Temperature Coefficient:
All inputs ±(0.02% of input ±0.2 digit)/°C
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-typica
DP3
DP2
DP1
unbalanced @ 60Hz): 90dB min
The
Note: Any physical damage to the meter during
calibration will void warranty.
L1 (POS) (Power)
L2 (NEG) (Power)
EX (NEG)
EX (POS)
DP COMMON
(HOLD)
INPUTS: DC Voltage
200mV
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
Range
200V
20V
2V
(24mm x 72mm)
Resolution
100 V
10mV
10 V
1mV
(22.2 x 68mm)
Impedance
>100M
10M
10M
10M
Input
Maximum
Input
100V
750V
750V
750V