Model 109SC Blasters Multimeter w/Stray Current Tester Kit

Click here for Stray Current Testing Procedures

MODEL 109SC Blaster's Ohm Meter w/Stray Current Tester Kit
The 109SC Kit uses the same meter as the Model 109 but allows checking for stray current. The 109SC is a safety MUST when using electric blasting caps. Remember, stray current must be tested for prior to any electric blasting operation, OSHA 29CFR 1926, 906B and MSHA 30CFR 77.1304.TT.



Meter Specifications
Model 109SC
Weight 5 LBS. (2kg)
Size 10.8 x 9.85 x 4.5 (274x250x114 mm)
Seal Dust and Damp Weather Proof Weather Proof
MSHA Approved NO
Ranges 8 Range w/stray current testing.
Battery Type 9V NEDA 1604/1604A
Current Output <4mA

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109SC Digital Multimeter with stray current test procedure:

1. Drive first stake into soil near the blast line. This will be the center stake.

2. The second stake will be moved around the center stake at various points within the blast site, Connecting wire may be run from each stake to the tester. (For each test, this stake will have to be driven in 6" - 8" and be tight).

Note: SOIL MUST BE MOIST IN THE STAKE AREA. IF SOIL IS DRY, ADD WATER UNTIL SOIL IS MOIST.

3. Connect meter with the red lead to one stake and the black lead to the other stake. Direction (Polarity) does not matter.

4. Turn the dial to the "2" setting, and note reading (DCV) then (ACV). If the reading is greater than .049 on either DCV or ACV, or the combined total of ACV and DCV, run the test again depressing the button on the top of the black box instrument. This shunts the leads with a 1 ohm resistor.

NOTE: WHEN THE SHUNTING BUTTON IS USED, IT SHOULD NOT BE DEPRESSED FOR MORE THAN 10 CONSECUTIVE SECONDS FOR ANY ONE MEASUREMENT, FAILURE TO FOLLOW THIS REQUIREMENT COULD RESULT IN THE CIRCUIT BOARD OVERHEATING.

The readings should drop to near zero. If the readings are still greater than .049, stray current is too high and the source will have to be found or a non-electric system will have to be used.

NOTE: IT IS HIGHLY RECOMMENDED THAT THE USER REVIEW THE SECTION ON STRAY CURRENT IN THE "ISEE EXPLOSIVES HANDBOOK". THIS SOURCE EXPLAINS IN GREATER DETAIL THE CHARACTERISTICS OF STRAY CURRENT AND HOW TO TEST FOR IT.

NOTE: THIS METER IS NOT MSHA APPROVED FOR THE USE IN GASSY MINES

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FEATURES
DC Voltage	200.0 mV, 2.000 V, 20.00 V, 200.0 V, 1500 V
AC Voltage	200.0 mV, 2.000 V, 20.00 V, 200.0 V, 1000 V
Current	AC/DC 200.0 µA, 2.000 mA, 20.00 mA, 200.0 mA, 2 A
Resistance	200.0 O, 2.000 kO, 20.00 kO, 200.0 kO, 2.000 MO, 20.00 MO

 

Specifications
DC Volts range:	200 mV, 2 V, 20 V, 200 V, 1500 V
DC Volts resolution:	0.1 mV
DC Volts accuracy:	All ranges ±(0.1 % rdg+2 dgts)
DC Volts input impedance:	10 MO
DC Volts OL protection:	>1500 V DC/1000 V AC rms
DC Volts transient protection:	>12 kV impulse (1.2 µS/50 µS) based on EN 61010-1:2001 impulse requirement for at CAT IV 1000 V product. This product should not be used in installations where transients exceed 12 kV
AC Volts (45 Hz to 2 kHz) ranges:	200 mV, 2 V, 20 V, 200 V, 1000 V
AC Volts (45 Hz to 2 kHz) resolution:	0.1 mV
AC Volts (45 Hz to 2 kHz) accuracy:	200 mV to 200 V (45-500 Hz) ±(0.8 % rdg+4 dgts),
AC Volts (45 Hz to 2 kHz) accuracy:	200 mV to 200 V (500 Hz-2 kHz) ±(1.5 % rdg+5 dgts)
AC Volts (45 Hz to 2 kHz) accuracy:	1000 V (50-60 Hz) ±(0.8 % rdg+4 dgts)
AC Volts (45 Hz to 2 kHz) accuracy:	1000 V (60-500 Hz) ±(1.5 % rdg+5 dgts)
AC Volts (45 Hz to 2 kHz) input impedance:	10 MO
AC Volts (45 Hz to 2 kHz) OL protection:	1500 V DC/1000 V AC rms
AC Volts (45 Hz to 2 kHz) transient protection:	12 kV impulse (1.2 µS/50 µS) based on EN 61010-1:2001 impulse requirement for at CAT IV 1000 V product. This product should not be used in installations where transients exceed 12 kV.
DC Current range:	200 µA, 2 mA, 20 mA, 200 mA, 2 A
DC Current resolution:	0.1 µA
DC Current accuracy:	200 µA to 20 mA ±(0.5 % rdg+2 dgts)
DC Current accuracy:	200 mA to 2 A ±(1.0 % rdg+2 dgts)