FEATURES
- LARGE DIGITAL DISPLAY
- AUTO RANGING UNITS
- DUAL MODE CAPACITY FOR
- DOSE RATE & COUNT RATE
- HP-265 and MRSP-1 PROBES
ERK-525
EMERGENCY RESPONSE KIT/Dual Probes
The ERK-525 is a complete portable radiation monitoring system designed to measure a broad range of radioisotope contamination under field conditions. The DSM-525 is a dual probe (connected at the same time) survey meter that measures contamination and dose levels from micro-R to 200 mR/hr. The ERK-525 does not require changing probes to obtain the full operational benefits of the system; the user needs only to turn the selector switch to the desired probe and the rest of the operation is automatic. The instrument and accessories are contained in a very durable water-resistant carrying case for easy storage and portability.
| SPECS | ERK-525 |
DSM-525 SPECIFICATIONS
| Dose/Counts Switch | Change Dose Rate to Count Rate by Toggling an External Switch |
| Display | LCD 4-Digit x .75″ LCD w/LED Backlight |
| Two External Probes | HP-265 (GM) and MRSP-1 (Scintillation) |
| Dose Range | See Probe Specifications Below |
| Energy Range | See Probe Specifications Below |
| CPM Range | 0-999.9 Kcpm or Kcps |
| Probe Linearization | Internal adjust for calibration constant and dead time |
| Scaler Ranges | 0-999.9 Kcounts |
| Scaler Count Time Ranges | 10-2550 Seconds (10 second increments) |
| Alarms | 5-95% of Range |
| Diagnostics | Low Battery, Over-range – Audible & Visual Alarms |
| Range Adjustment | Auto-Ranging All Scales |
| Electrical Non-Linearity | < 5% Full Scale |
| Response Time | Fast – 10-2550 Seconds (adjustable) | Slow 10-250 seconds (adjustable) |
| Drift | < 5% |
| Environmental | -20°F[-28°C] to 140°F[60°C] 5-95% RH IPX4 Housing |
| High Voltage Adjustable | 400-1250 VDC | Regulation +-1% |
| Battery | 6 – “AA” Alkaline (nominal 200hrs Operation) |
| Dimensions | 6.25″(16cm) H x 4″ (10cm) W x 7″(18cm) L |
| Weight | 2.5 lbs. (1.2 Kilos) |
HP-265 SPECIFICATIONS
| General Use | Alpha, Beta, Gamma Detection |
| Detector Type | Halogen-Quenched GM Pancake Tube |
| CPM Range | 0-999.9 Kcpm or Kcps |
| Dose Range | 0-200 mR/hr (Cs137) – Requires linearization above 50 mR/hr |
| Window | 1.7 ± 0.3 mg/cm2 mica, protected by a Copperl screen (79% open) |
| Window Area | Active – 15.5 cm2 (2.4 in2) Open – 12.3 cm2 (1.9 in2) |
| Efficiency (4π) | C14 – 5%, SrY90 – 22%, Tc99 – 19%, P32 – 32% |
| Energy Response | Energy Dependent |
| Sensitivity (Cs137 gamma) | ≈ 3300 cpm/mR/hr |
| Operating Voltage | 900 vdc |
| Dead Time | 80 µsec |
| Normal Background | ≈ 60 cpm |
| Environmental | -20°F[-28°C] to 140°F[60°C] 5-95% RH |
| Connector | BNC (other types available) |
| Dimensions | 2.74″ (7cm) Dia x 11″ (28cm) L |
| Weight | 1lbs (0.45 kg) |
MRSP-1 SPECIFICATIONS
| General Use | Low Level Gamma Dose Rate Measurements |
| Detector Type | 1.5” dia x 1” Plastic Scintillator |
| CPM Range | 0-999.9 Kcpm |
| Dose Range | 1 µR/hr – 10 mR/hr (Cs137) |
| Energy Response | 40keV – 2 MeV (near tissue equivalent) |
| Sensitivity (Cs137 gamma) | ≈ 100cpm/µR/hr |
| Efficiency (4π) | ≈ 2% |
| Background (10 µR/hr) | ≈ 900cpm |
| Operating Voltage | 600 – 1100 vdc |
| Dead Time | ≈ 35 µsec |
| Compatibility | All Johnson Rate Meters |
| Environmental | -20°F[-28°C] to 140°F[60°C] 5-95% RH |
| Connector | BNC (other types available) |
| Dimensions | 1.7″ (4.25cm) Dia x 6” (15cm) L |
| Weight | 4 oz (0.11 kg) |
