diff --git a/projects/common/src/fm/services/item.service.ts b/projects/common/src/fm/services/item.service.ts
index 5262e27..2cdb88c 100644
--- a/projects/common/src/fm/services/item.service.ts
+++ b/projects/common/src/fm/services/item.service.ts
@@ -5,7 +5,7 @@ import { IItemType } from '../models/item.type';
 import { IItem } from '../models/item';
 import { IJsonline } from '../models/json-line';
 import { IItemTask } from '../models/itemTask';
-import { HttpClient, HttpParams } from "@angular/common/http";
+import { HttpClient, HttpParams,HttpHeaders } from "@angular/common/http";
 import { AppConfig } from "../shared/app.config";
 import {ItemTypeService} from './itemtype.service';
 
@@ -61,10 +61,10 @@ export class ItemService {
     return this.httpClient.get<IItem>(`${this.ApiEndpoint()}/api/v1/items/${code}`);
   }
 
-  getItemData(code: string,limit?:number): Observable<ArrayBuffer> {
-    var params = new HttpParams();
-    if(limit) params=params.append("limit", limit.toString());  
-    return this.httpClient.get(`${this.ApiEndpoint()}/api/v1/items/${code}/data`,{ params: params,responseType: 'arraybuffer' });
+  getItemData(code: string,start?:number,size?:number): Observable<ArrayBuffer> {
+    var headers = new HttpHeaders();
+    if(start && size) headers=headers.append("Range",`bytes=${start}-${size-1}`);
+    return this.httpClient.get(`${this.ApiEndpoint()}/api/v1/items/${code}/data`,{ headers: headers,responseType: 'arraybuffer' });
   }
 
   getItemByCodeAndType(code: string, itemType: string): Observable<IItem> {