USER'S MANUAL Digital Multimeter DMR-1100A CIRCUIT-TEST ELECTRONICS www.circuittest.
INTRODUCTION Your Circuit-Test DMR-1100A Digital Multimeter incorporates the latest technology to provide you with a feature packed instrument. With it you can measure a wide range of voltages, current and resistance in the lab, shop, car and home. This product has been designed for the electrician, technician and hobbyist. SAFETY INFORMATION This meter conforms to IEC-61010 for Category I 600V and pollution degree 2.
This symbol advises the user that the terminal(s) so marked must not be connected to a circuit point at which the voltage with respect to earth ground exceeds (in this case) 600 VAC or VDC. WARNING 1. Set the function switch correctly before making any measurements. 2. Do not operate the unit unless the case is completely closed. 3. Disconnect test leads from equipment before removing the battery. 4.
FEATURES Diode Check - test diodes and other semiconductors for open and short circuits. Overload Protection - protects the meter from overvoltage. Auto-Polarity - indication on display that polarity is reversed. Battery Test - 1.5V and 9V batteries. FRONT PANEL 2 1 20 V 200 600 OFF 600 ~ V 200 2000 μ 20 m 2000 m A 200 m 200 m 2000 k 200 k 10A Ω 1.5V 20k BATT. 2000 9V 200 CIRCUIT-TEST 10A UNFUSED 10A MAX For 10 sec. MAX every 15 min.
SPECIFICATIONS a. GENERAL Display: 3.5 digit, 0.5" (12mm) H LCD Polarity: Automatic, minus (-) sign indicates negative polarity Ranging: Over range: Low Battery: Manual ranging "1" is displayed " " or "BAT" indicates low battery Input Impedance: 1M Ω (DCV/ACV) Sampling Rate: About 2 to 3 times/sec. Storage Temp.: -10 to 50oC Power Source: 1 - 9V Battery Operation Temp.: 0 to 40oC Fuse: Dimensions: Weight: GMA 250mA/250V 70(W) x 127(H) x 25(D)mm 170g (including battery) b.
DC VOLTAGE RANGE RESOLUTION ACCURACY 200mV 100μV ± (0.5% + 5) 2000mV 1mV 20V 10mV 200V 100mV 600V 1V Input Impedance: ± (0.8% + 5) ± (1.0% + 5) 1M Ω Max. Allowable Input Voltage: 600V DC/AC rms AC VOLTAGE RANGE RESOLUTION 200V 100mV 600V 1V Input Impedance: ACCURACY ± (1.2% + 10) 1M Ω Frequency Response: 45Hz - 400Hz Max.
DC CURRENT RANGE RESOLUTION ACCURACY 2000μA 1μA 20mA 10μA 200mA 100μA ± (1.2% + 5) 10A 10mA ± (2.0% + 5) Overload Protection: ± (1.0% + 5) Fuse, 250mA/250V, Fast (for the "VΩ inputs only) mA" terminal's There is no fuse protection for the "10A" terminal's inputs. Max. Allowable Input Current: 10A (For inputs > 2A : measurement duration < 10 secs, interval > 15 minutes) RESISTANCE RANGE RESOLUTION ACCURACY 200Ω 0.1Ω ± (1.2% + 5) 2000Ω 1Ω 20kΩ 10Ω 200kΩ 100Ω 2000kΩ 1kΩ Max.
DIODE AND CONTINUITY RANGE DESCRIPTION Test Voltage: about 2.8V Test Current: about 1mA The approximate forward voltage drop in mV will be displayed. The built-in buzzer will sound when the resistance is less than about 50Ω BATTERY TEST RANGE DESCRIPTION 1.5V The working voltage of the battery will be displayed on the LCD. 9V 8 TEST CONDITION The working current is about 20mA. The working current is about 5mA.
MEASUREMENTS Please take a few minutes to read these instructions prior to use. 1 DC VOLTAGE MEASUREMENT WARNING: Maximum input is 600V DC. 1-1 Plug the red test lead into the V jack and the black test lead into the COM jack. 1-2 Set the range switch to the desired position. It is best to start with the highest range if the voltage is not known. 1-3 Attach the test leads to the circuit to be measured.
3 RESISTANCE MEASUREMENT WARNING: Remove all power from the circuit being tested when checking resistance. Discharge any charged capacitors. Never connect the probes to any voltage while the selector is set to OHM. 3-1 Plug the red test lead into the V jack and the black test lead into the COM jack. 3-2 Set the range switch to the desired Ω position. If the resistance is not known, set the switch to highest range and reduce until a satisfactory reading is obtained. 3-3 Attach the test leads to the circuit.
4-2 Set the range switch to one of the current ranges. If you are unsure of the amount of current being measured set switch to the highest reading and reduce until a satisfactory reading is obtained. 4-3 Remove power from the circuit that is to be measured. Open up the circuit and connect the black lead to the negative side and the red lead to the positive side of the circuit so that the test leads are in series with the load to be measured. 4-4 Apply power to the circuit. 4-5 Read the displayed current.
5-3 Connect the red test lead to the anode and the black test lead to the cathode of the diode to be tested. 5-4 The approximate forward voltage drop of the diode will be displayed in mV. If the connection is reversed “1” will be displayed. 6 CONTINUITY TEST WARNING: Remove all power from the circuit being tested when checking continuity. Discharge any charged capacitors. Never connect the probes to any voltage while the selector is set to .
Battery Good Weak Bad 9V > 8.2V 7.2 to 8.2V < 7.2V 1.5V > 1.35V 1.22 to 1.35V < 1.22V MAINTENANCE 1 BATTERY REPLACEMENT WARNING: Disconnect both test leads from any equipment before removing back cover. Do not use the meter with the case opened. 1-1 Disconnect both test leads and turn off the power. 1-2 Remove the screws in the rear cover of the case and remove the cover. 1-3 Unsnap the battery from the connector and replace with a new 9V battery. 1-4 Replace the cover and cover screws.
2-3 Replace the blown fuse with a GMA 250mA/250V fuse. Do not use a fuse which has a higher rated value than specified or try to bypass the fuse. 2-4 Replace the cover and cover screws. LIMITED WARRANTY Circuit-Test Electronics warrants to the original purchaser that this product be free of defect in material or workmanship for a period of 2 years from the date of purchase. Any product which has been subjected to misuse or accidental damage is excluded from the warranty.
