Blasters Stray Current Multimeter Kit: Model 309SC
MODEL 309 BLASTERS MULTIMETER KIT
Designed for the blasting industry. The 309 Blaster's Multimeter Kit is for safe, precise circuit measurement when testing electric detonators & blasting circuits.
It has a built-in current limiting circuit with current output less than 25 miliamperes. This kit comes with the meter, a protective rugged case, and digital test leads.
High performance and value priced. The new dual injection molded case allows for a better grip and offers better meter protection. CE marked and UL listed.
Blasters Stray Current Multimeter Kit: Model 309SC
Used to check for stray current. The 309SC is a safety MUST when using electric blasting caps. Ensures compliance with OSHA 29CFR 1926, 906B and MSHA 30CFR 77.1304.TT.
Safety Reminder: You MUST test for stray current prior to any electric blasting operation.
Specs
Kit Specifications:
- Multimeter: BK Precision 388B (Features a custom built-in current limiting circuit with current output less than 25 miliamperes.)
- Weight (with case): 2.7 LBS. (1.2kg)
- Weight (without case): .95 LBS. (.43 kg)
- Size: 10.8 x 9.85 x 4.5 (274x250x114 mm)
- Seal: Dust and Damp Weather Proof
- MSHA Approved: NO
- Battery Type: 9V NEDA 1604/1604A
- Current Output: <25mA
Features:
- 3 3/4, 4000 count LCD display
- 0.5% basic accuracy
- Transistor test (hFE)
- Auto power off
- All current ranges are fused protected
- Designed to meet IEC61010 1, CATIII 600V, class2
- Dual injection molded case that allows a better grip and offers better meter protection
- CE marked and UL listed
Comparison
The 309 kit offers higher voltage measurement capabilities (1000VAC/1500VDC) compared to the 310 kit (750VAC/1000VDC). Additionally, the 309 kit features a higher resolution display with a 3-3/4 digit LCD and 4000 counts, and it provides better accuracy at 0.5%. In contrast, the 310 kit has a 3-1/2 digit LCD with 2000 counts and an accuracy of 1.5%.
However, the 310 kit is more cost-effective and provides all the essential features needed for most users in the blasting industry. It is priced significantly better, making it an ideal choice for those who require reliable performance without the additional capabilities of the 309 kit.
| Feature | Model 109 (discontinued) | Model 309 | Model 310 (most popular) |
|---|---|---|---|
| Voltage Range | 1000VAC/1500VDC | 1000VAC/1500VDC | 750VAC/1000VDC |
| Battery | Standard 9 V battery | Standard 9 V battery | Standard 9 V battery |
| Low battery indication | Yes | Yes | Yes |
| Ranging | Manual | Manual | Manual |
| Accuracy | 1.5% | 0.5% | 1.5% |
| Max Output | 44mA | 25mA | 25mA |
| Display | 3-1/2 digit LCD, 1999 counts | 3-3/4 digit LCD, 4000 counts | 3-1/2 digit LCD, 2000 counts |
| Weight (Meter Only, no case) | 20 oz | 11.3 oz | 11.3 oz |
| Weight (With case) | 36 oz | 28 oz | 28 oz |
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