Model LC-4.5 Voltmeter by M.C. Miller
Description
Model LC-4.5 is the first hand-held voltmeter to include a number of special features which facilitate corrosion and cathodic protection testing on underground structures. It is designed for field testing under almost any environmental conditions. Sealed Mil Spec. switches, sealed windows, a gasketed case and a printed circuit board with baked-on moisture and fungus resistant coating on both sides make this possible.
The large (0.5") display characters are easy to read under both high and low lighting conditions and function over a wide temperature range with very little drain on the battery.
The LC-4.5 is recommended for potential surveys, side drain measurements, surface potential surveys, IR drop measurements, checking both the AC and DC circuits of rectifiers, checking for stray or hazardous AC potentials, and checking galvanic anodes. DC current measurements require the use of an optional plug-in shunt (0-20 Amp).
The selectable input resistance feature permits detection of high resistance in the external circuit and elimination of resulting errors in virtually all cases.
The push-to-hold-reading button freezes the display at any desired time, which makes the meter usable in many areas having varying stray currents. It is also useful when conducting instant-off and coordinated tests.
The LC-4.5 Voltmeter comes in a protective leather carrying case and is supplied with two 6ft long test leads (one with red, one with black PVC insulation) with 40A test clips.
Specifications
|
Logic |
CMOS, crystal controlled timing. |
|---|---|
|
Display |
Liquid crystal, 3 1/2 digits, 0.5" high. |
|
DC Voltage Range |
0 - 20 mV (0.01 mV resolution) |
|
AC Voltage Range |
0 - 600 V (1 V resolution) |
|
Resistance Range |
0-200 Ohms (0.1 Ohm resolution) |
|
DC Current Range |
0-20A (0.01A resolution) |
|
Accuracy |
DC Volts: 1% of reading +1 digit |
|
AC Rejection |
20 mV dc range: 20 mV ac |
|
DC Rejection |
600V ac range: 600 V dc |
|
Zero |
Automatic |
|
Decimal Point |
Automatic; set by range switch. |
|
Polarity |
Automatic; negative symbol displayed, positive assumed. |
|
Input Resistance |
20 mV range, 1000 Ohms. All other DC Volts ranges are switch selectable (10, 25, 50, 100, 200 megohms). |
|
Operating Temperature |
+8°F to +176°F (-14°C to +80°C). |
|
Battery |
One 9 V alkaline recommended. |
|
Dimensions |
6-1/8" x 3-5/8" x 1-3/4" overall (15 x 8 x 4.5 cm) |
|
Weight: |
11 oz approx. (0.312 kg) |
| Logic | CMOS, crystal controlled timing. |
| Display | Liquid crystal, 3 1/2 digits, 0.5" high. |
| DC Volt Range | 0 - 20 mV (.0l mV resolution) 0 - 200 mV (.l mV resolution) 0 - 2 V (l mV resolution) 0 - 200 V (.l V resolution) |
| AC Volt Range | 0 - 600 V (l V resolution) |
| Resistance Range | 0-200 Ohms (.1 Ohm resolution) |
| DC Current Range | Using optional .001 Ohm LC Shunt: 0-20 A (.01 A resolution) |
| Accuracy | DCV: 1% of reading +1 digit. ACV: 3% of reading +1 digit Ohms: 2% of reading +1 digit. |
| AC Rejection @ 50/60/400 Hz |
20 mV range: 20 mV AC 200 mV range: 5 VAC 2 V range: 120 VAC 200 V range: 600 VAC |
| DC Rejection | 600 VAC range: 600 VDC |
| Zero | Automatic |
| Decimal Point | Automatic; set by range switch. |
| Polarity | Automatic; negative symbol displayed, positive assumed. |
| Input Resistance | 20 mV range; 1000 Ohms. All other DCV ranges are switch selectable (10, 25, 50, 100, 200 megohms). |
| Operating Temperature | +8oF to +176oF (-14oC to +80oC). |
| Battery | One 9V alkaline recommended. |
| Dimensions | 6-1/8 x 3-5/8 x 1-3/4" overall (15 x 8 x 4.5 cm) |
| Weight: | 11 oz. approx. (0.312 kg.) |
