Sealey MM18 - Features; Display Overview; Control Functions; Test Probes

Original Language Version
© Jack Sealey Limited
1.3. ELECTRICAL SYMBOLS
2. INTRODUCTION
Handy compact unit, small enough to fit in your pocket, making it ideal for basic circuit testing whilst on the move. Features flip lid for added screen
protection and storage of leads. Conforms to EN 61010-1 CAT II safety requirements. Supplied with test leads. Measures: AC and DC Voltage,
DC Current, Resistance, Audible Continuity
3. FEATURES
4. SPECIFICATION
Model No: ..................................................................... MM18
Measures:
Voltage DC: .............................. 2V, 20V, 200V, 250V (±1.0%)
Voltage AC: ...................................................... 250V (±1.2%)
Current DC: ....................................................200mA (±1.2%)
Resistance: ............... 2k Ω, 20k Ω, 200k Ω, 2000k Ω (±1.2%)
Continuity Audible: ........................................................... Yes
Digits x Height: .......................................................5 x 11mm
Batteries (Supplied):..................................................2 x 1.5V
Size (L x W x H): .........................................114 x 56 x 23mm
Weight: ........................................................................... 101g
Conformity: .......................................................... EN 61010-1
Operation Environment: ...................................... 0°C to 40°C
Relative Humidity: .........................................................<75%
Storage Temperature: ...................................... -10°C to 50°C
Relative Humidity: .........................................................<85%
Alternating Current.
Direct Current.
Both direct and alternating current.
Caution risk of danger refer to operating
manual before use.
Caution risk of electric shock.
Earth (ground) terminal.
Fuse.
The equipment is protected throughout by double insulation or
reinforced insulation.
1. Display: 3½ digit LCD, with a max. reading of 1999.
2. Function selector.
3. Range Switch: used to select desired range.
4. Test Probes
RESISTANCE
Range Resolution Accuracy
2kΩ 0.001kΩ
± (1.2% + 5 digits)
20kΩ 0.01kΩ
200kΩ 0.1kΩ
2000kΩ
1kΩ
Max open circuit voltage: About 0.4V
Overload protection: 250V DC/AC rms
AC VOLTAGE
Range Resolution Accuracy
200V 0.1V
± (1.2% + 10 digits)
250V 1V
Input Impedance:500kΩ
Frequency range: 40Hz to 400Hz
Max. Allowable Input Voltage: 250V ac rms
Response: Average, calibrated in rms of sine wave.
DC CURRENT
Range Resolution Accuracy
200mA 0.1mA ± (1.2% + 5 digits)
Overload protection: 250mA/250AV Fast fuse
DC VOLTAGE
Range Resolution Accuracy
2V 0.001V
±(1.0% +5 digits)
20V 0.01V
200V 0.1V
250V 1V
Input Impedance: 1MΩ
Max Allowable Input Voltage: 250V dc
MM18 | Issue:3 (H,F) 07/12/18
DIODE AND CONTINUITY
Range Description Remark
The display shows the approximate forward voltage drop of the diode. Open circuit voltage about 2.5V
Max test current: 1mA
The built in buzzer will sound if the resistance is less than about 30Ω.
The buzzer may not sound if the resistance is between 30Ω and 100Ω.
The buzzer will not sound if the resistance is more than 100Ω.
Open circuit voltage about 2.5V.
Overload protection: 250V DC/AC rms