SYSCAL Junior Resistivity Meter

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Case History

Features

• Unique 2 channel design measures both voltage and current simultaneously
• Maximum voltage 800 V Peak to Peak
• Maximum output current 1.2 A
• Compatible with automated electrode switching system
• 20 Bit A/D converter
• Chargeability / IP Measurements

General

The Syscal Junior resistivity meter is an ideal instrument for applications with depths of investigation in the range of 100 meters or less. The 100W transmitting power is quite adequate at these depths and the light weight of the Junior resistivity meters, only 7 kg with internal battery, makes easy work of moving along your profile. The combined transmitter/receiver unit is micro processor based and features a large, easy to read LCD display.

Measurement is fully automatic. Pressing the Start/Stop key to initiate a measurement will first cause the SP value to be measured and then stored. The Junior will then display the average values of voltage and current, with standard deviation, until the stop key is pressed. If the operator has selected the appropriate electrode array and spacing parameters the apparent resistivity value is calculated. Memory storage for 1000 sets of readings with all related parameters is provided.

The SP value is displayed so that noisy conditions may be observed. SP compensation is recalculated during stacking with every third stack, providing excellent linear drift correction.  Automatic ranging during digital stacking improves noise reduction. A 20 bit A/D converter is used to provide the best resolution and highest quality data.

Power is supplied from internal rechargeable battery, or external 12V. The battery charger is external and may be switched between 110 or 220V. Typical operation time on the fully charged internal battery is greater than 3,000 cycles. Data transfer is provided by standard RS232 port.

The unique two channel design of the syscal resistivity meters, allows for measurement of both voltage and current during stacking. This provides the most optimized design to ensure the best data quality and noise rejection. Noise rejection is greater than 120 dB at power line frequencies. Voltage resolution after stacking is 1 microvolt, with accuracy of better than 0.5%.

Specifications

Transmitter Specifications

• Resolution: 10µA
• A/D Converter: 20 bit
• Accuracy: 0.5%
• Maximum Outout Current: 1.2 A
• Max. Output Power: 100W
• Max. Output Voltage: 400V (800V peak to peak)
• Pulse Duration: 0.5s, 1s and 2s

Receiver
Voltage Measurement Specifications:

• Resolution: 1µV after stacking
• Accuracy: 0.5%
• Output Impedence: 10 Mohms
• Input overvoltage protection up to 1000 V
• Input Voltage Range: -10V to +10V
• Automatic SP Bucking: (-10V to +10V) with linear drift correction (up to 1 mV/s)
• 50Hz and 60Hz power line rejection
• Continuous Digital Stacking: up to 250 stacks

Miscellaneous

• LCD display of 2 lines, 20 charactersli>
• Weather resistant case
• Dimensions: 31 x 21 x 25cm
• Weight: 7kg, including battery
• Power Supply: Internal 12V rechargeable battery, or external 12V
• Operating Temp. Range: -20°C to +70°C
• Storage Temp. Range: -40°C to +80°C

Standard Components
 
Syscal Junior resistivity meter console, instruction manual, data transfer cable and software.

Ordering Information
 

Description		Order Number
Syscal Junior resistivity meter		500-190-0180
Multi-Electrode Nodes		500-190-0170
Sounding Cable Set		500-190-0160
Wenner Cable Set		500-190-0150