Martel Electronics DPM125 - Manual

DIMENSIONS All dimensions in mm (inches)
12.5mm (0.5“) Digit Height
Logic Selectable Decimal Points
Auto-zero
Auto-polarity
200mV d.c Full Scale Reading (F.S.R.)
Low Battery Indication
DPM 125
3½ Digit LCD Module
SCALING
Two resistors may be used to alter the full scale reading of
the meter - see table.
Note that the meter will have to be re-calibrated by
adjusting the calibration pot .
Required F.S.R. Ra Rb
2V 910k 100k
20V 1M 10k
200V 1M 1k
2kV Note 10M 1k
200 A 0R 1k
2mA 0R 100R
20mA 0R 10R
200mA 0R 1R
Ensure Ra is rated for high voltage use.
µ
NOTE
PANEL FITTING
Fit the bezel to the front of the panel and then locate the meter into the bezel from behind. Alternatively the meter and bezel may be assembled
before fitting into the front of the panel but care must be taken not to use excessive force. Finally fit the window into the front of the bezel.
This compact LCD DPM is ideally suited for low or high volume applications. It features an exceptionally large display in a miniature
package. The meter will plug directly into a SIL socket or can be panel mounted using the snap in bezel provided. The low profile bezel
incorporates a flat reverse printed window giving a superb appearance that cannot be damaged or rubbed of by contact.
Specification Min. Typ. Max. Unit
Accuracy (overall error) * 0.05 0.1 % (±1 count)
Linearity ±1 count
Sample rate 3 samples/sec
Operating temperature range 0 50 °C
Temperature stability 100 ppm/°C
Supply voltage (V+ to V-) 7.5 9 14 V
Supply current 150 A
Input leakage current (Vin = 0V) 1 10 pA
* To ensure maximum accuracy, re-calibrate periodically.
µ
Stock Number
Standard Meter DPM 125
48 (1.89)
24
(0.94)
a b
a. 1.50 (0.06)
b. 9.00 (0.35)
c. 5.00 (0.20)
d. 1.60 (0.06)
e. 4.00 (0.16)
f. 10.4 (0.41)
g. 7.50 (0.30)
h. 2.54 (0.10)
i. 0.50 (0.02)
Panel cut-out
45 x 22.2 (1.77 x 0.87)
g h i
38.0 (1.50)
40.5 (1.59)
20.4
(0.80)
18.2
(0.72)
ROH RHI RL
O
COM IN
LO
IN
HI
V+ V- TEST DP3 DP2 DP1
f
c
e
d
31.0 (1.22)
14.0
(0.55)
Viewing Area showing
display in TEST mode
-
+
INPUT
+
-
Ra
Rb
IN HI (7)
IN LO (8)
1 1 12 12
REAR VIEW
1
4
2 3
9
11
DP3 DP2 DP1
ON BOARD SOLDER LINKS